THERE ARE FEW THINGS YOU NEED TO DO BEFORE STARTING
A detailed instruction help available here https://projects.raspberrypi.org/en/projects/raspberry-pi-setting-up and https://www.raspberrypi.org/help/noobs-setup/2/
Please fallow the instruction you would able to install Raspberry software on to SDXC Micro SD card.
Formatting 64GB Micro SD Card https://www.raspberrypi.org/documentation/installation/sdxc_formatting.md
The root cause of this issue is the chrome browser is running on full screen mode, After few minutes Raspberry Pi screen turned into blank, due to a blank black screen saver appear on screen. to resolve this issue
sudo apt-get install xscreensaverWe’ll be using the Adafruit DHT11 Python library. You can download the library using Git, so if you don’t have Git installed on your raspberry-pi already, enter this at the terminal:
sudo apt-get install git-coreNote: If you get an error installing Git, run sudo apt-get update and try it again.